<template>
  <div class="component-upload-image">
    <el-upload
      v-if="operate !== 'view'"
      multiple
      :action="uploadImgUrl"
      :data="{ type }"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :accept="fileType.join(',')"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="videoUpload"
      :on-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :file-list="realFileList"
      :class="{ hide: this.fileList.length >= this.limit }"
    >
      <el-button
        size="small"
        type="primary"
      >点击上传</el-button>
    </el-upload>

    <!-- 上传提示 -->
    <div
      class="el-upload__tip"
      slot="tip"
      v-if="showTip && operate !== 'view'"
    >
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("、") }}</b>
      </template>
      的文件,且最多上传
      <b style="color: #f56c6c"> {{ limit }} </b>
      个
    </div>

    <!-- <img-info
      v-if="operate === 'view'"
      v-model="value"
      width="146px"
      height="146px"
    ></img-info> -->

  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import { hasHttp, isJSON } from "@/utils/index";
export default {
  props: {
    value: [String, Object, Array],
    type: {
      type: String,
      default: "COMMON",
    },
    // 文件数量限制
    limit: {
      type: Number,
      default: 5,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 50,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => [],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
    operate: String,
  },
  computed: {
    realFileList () {
      return this.fileList.map((item) => {
        return {
          uid: item.uid,
          name: item.name,
          url: hasHttp(item.url) ? item.url : minioPath + item.url,
        };
      });
    },
    // 是否显示提示
    showTip () {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  data () {
    return {
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/uploadFile", // 上传的文件服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
    };
  },
  watch: {
    value: {
      async handler (val) {
        if (val && isJSON(val)) {
          let originData = JSON.parse(val);
          this.fileList = originData;
        } else {
          this.fileList = [];
          this.$emit("input", "")
        }
      },
      deep: true,
      immediate: true,
    },
  },
  methods: {
    // 上传前loading加载
    handleBeforeUpload (file) {
      let isImg = false;
      let fileExtension = "";
      if (this.fileType.length) {
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type.replace('.', '')) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$modal.msgError(
          `文件格式不正确, 请上传${this.fileType.join("/")}文件格式文件!`
        );
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传头像文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传文件，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed () {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传成功回调
    handleUploadSuccess (res, file) {
      if (res.code === 200) {
        this.uploadList.push({
          name: res.data.name,
          url: res.data.url,
          uid: res.data.uid,
        });
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.videoUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除文件
    handleDelete (file) {
      const findex = this.fileList.map((f) => f.uid).indexOf(file.uid);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传失败
    handleUploadError (res) {
      this.$modal.msgError("上传文件失败，请重试");
      this.$modal.closeLoading();
    },
    // 上传结束处理
    uploadedSuccessfully () {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 对象转成指定字符串分隔
    listToString (list, separator) {
      return JSON.stringify(list);
    },
  },
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
</style>
